<html>
<title>计算器</title>
<style>
</style>
 
<body>
   
<form action= "06.php" method="post" >
	<input type="text" name= "op1" >
	<select name="op" id="">
	<option value="add" >+</option>
	<option value="sub" >-</option>
	<option value="mul">* </option>
	<option value="div">/</option>
	</select>
	<input type="text" name=" op2" > 
	<p><input type= "submit" value="计算" /></p>
</form>

</body>
<script>
</script>
 
</html>
